Toner, toner storage unit, image forming apparatus, and method for manufacturing toner
A toner is provided that contains a crystalline polyester resin comprising a polycondensed resin of a dicarboxylic acid represented by the following formula (1) with a diol represented by the following formula (2). A content of a cyclic ester represented by the following formula (3) in the toner, measured by a thermal extraction gas chromatographic mass spectrometry at a thermal extraction temperature of 160° C., is from 1 to 200 ppm in terms of toluene: where n represents an integer of from 2 to 12; where m represents an integer of from 2 to 12; and where n represents an integer of from 2 to 12, m represents an integer of from 2 to 12, and m+n≥6 is satisfied.
1. A toner comprising:
a crystalline polyester resin comprising a polycondensed resin of a dicarboxylic acid represented by the following formula (1) with a diol represented by the following formula (2),
wherein a content of a cyclic ester represented by the following formula (3) in the toner, measured by a thermal extraction gas chromatographic mass spectrometry at a thermal extraction temperature of 160° C., is from 1 to 200 ppm in terms of toluene:
where n represents an integer of from 2 to 12;
where m represents an integer of from 2 to 12; and
where n represents an integer of from 2 to 12, m represents an integer of from 2 to 12, and m+n≥6 is satisfied,
wherein said toner is in the form of a particle.
2. The toner of claim 1 , wherein the polycondensed resin accounts for 95% by mol of the crystalline polyester resin.
3. The toner of claim 1 , further comprising a polyester resin in an amount of from 50% to 90% by mass of the toner.
4. The toner of claim 1 , wherein the content of the cyclic ester is from 5 to 100 ppm in terms of toluene.
5. The toner of claim 1 , further comprising an ester wax in an amount of from 2 to 10 parts by mass based on 100 parts by mass of the toner.
6. A toner storage unit comprising:
a container; and
the toner of claim 1 stored in the container.
7. An image forming apparatus comprising:
an electrostatic latent image bearer;
an electrostatic latent image forming device configured to form an electrostatic latent image on the electrostatic latent image bearer;
a developing device containing the toner of claim 1 , configured to develop the electrostatic latent image formed on the electrostatic latent image bearer with the toner to form a toner image;
a transfer device configured to transfer the toner image formed on the electrostatic latent image bearer onto a surface of a recording medium; and
a fixing device configured to fix the toner image on the surface of the recording medium.